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- https://phys.libretexts.org/Courses/Grossmont_College/ASTR_110%3A_Astronomy_(Fitzgerald)/12%3A_The_Death_of_Stars/12.07%3A_Introducing_General_RelativityEinstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment ca...Einstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment can distinguish between free fall and the absence of gravity.
- https://phys.libretexts.org/Bookshelves/Relativity/Book%3A_Relativity_Lite_-_A_Pictorial_Translation_of_Einsteins_Theories_of_Motion_and_Gravity_(Straton)/01%3A_Chapters/1.04%3A_Gravity_LiteEinstein extended his theory of the constancy of the speed of light to describe situations in which acceleration was present. He called this his general theory of relativity since it contains zero acc...Einstein extended his theory of the constancy of the speed of light to describe situations in which acceleration was present. He called this his general theory of relativity since it contains zero acceleration (constant speed) as a limit.
- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_2e_(OpenStax)/24%3A_Black_Holes_and_Curved_Spacetime/24.02%3A_Introducing_General_RelativityEinstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment ca...Einstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment can distinguish between free fall and the absence of gravity.
- https://phys.libretexts.org/Courses/Gettysburg_College/AST102%3A_GC_OER/11%3A_Black_Holes_and_Curved_Spacetime/11.02%3A_Introducing_General_RelativityEinstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment ca...Einstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment can distinguish between free fall and the absence of gravity.
- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_1e_(OpenStax)/24%3A_Black_Holes_and_Curved_Spacetime/24.01%3A_Introducing_General_RelativityEinstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment ca...Einstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment can distinguish between free fall and the absence of gravity.
- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Introduction_to_Astronomy_(Lumen)/13%3A_Galaxies/13.18%3A_Gravitational_LensingThis page discusses gravitational lensing, a phenomenon where massive objects bend light due to their gravitational fields, as explained by Einstein's General Theory of Relativity. Initially proposed ...This page discusses gravitational lensing, a phenomenon where massive objects bend light due to their gravitational fields, as explained by Einstein's General Theory of Relativity. Initially proposed by Fritz Zwicky in 1937 and confirmed in 1979, it includes various scales such as strong and microlensing. The page also highlights Edwin Hubble's contributions to astronomy, especially in identifying galaxies beyond the Milky Way, noting he did not receive a Nobel Prize in Physics before his death.
- https://phys.libretexts.org/Bookshelves/Classical_Mechanics/Variational_Principles_in_Classical_Mechanics_(Cline)/17%3A_Relativistic_Mechanics/17.08%3A_The_General_Theory_of_RelativityEinstein’s General Theory of Relativity expands the scope of relativistic mechanics to include non-inertial accelerating frames plus a unified theory of gravitation. That is, the General Theory of Rel...Einstein’s General Theory of Relativity expands the scope of relativistic mechanics to include non-inertial accelerating frames plus a unified theory of gravitation. That is, the General Theory of Relativity incorporates both the Special Theory of Relativity as well as Newton’s Law of Universal Gravitation. It provides a unified theory of gravitation that is a geometric property of space and time. In particular, the curvature of space-time is directly related to the four-momentum of matter and r
- https://phys.libretexts.org/Courses/Prince_Georges_Community_College/Introduction_to_Astronomy_(2025)/03%3A_An_Introduction_to_the_Universe/3.04%3A_Stellar_Birth_and_Evolution/3.4.04%3A_Black_Holes_and_Curved_Spacetime/3.4.4.02%3A_Introducing_General_RelativityEinstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment ca...Einstein proposed the equivalence principle as the foundation of the theory of general relativity. According to this principle, there is no way that anyone or any experiment in a sealed environment can distinguish between free fall and the absence of gravity.
